BugZero | Cisco BugID CSCvt37006 - New ssh session is not successful on having ssh bu...

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BugZero | Cisco BugID CSCvt37006 - New ssh session is not successful on having ssh bu...

ODD
Cisco
CSCvt37006

Cisco - Defect ID: CSCvt37006

New ssh session is not successful on having ssh bulk-mode and tcp window-size 262144+

ODD
Cisco
CSCvt37006

Cisco - Defect ID: CSCvt37006

New ssh session is not successful on having ssh bulk-mode and tcp window-size 262144+

Last updated on April 28th, 2025

BugZero Risk Score
6.0 Medium

Overall: 6.0

Severity: 6.4

Lifecycle: 9.1

Popularity: 3.7

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Bug Details

Views: 16

Description

Symptom

SSH on IOS-XE device running 17.2 release is not successful under certain conditions.

Conditions

1. Running 17.2.1 release 2. Feature SSH bulk-mode (ip ssh bulk-mode) is configured on the device. 3. "ip tcp window " is configured to (or slightly above) the value of 256K/512K/1M and etc.

Workaround

Change TCP window at least 10%.

Further Problem Description

Change history

2025-04-28 Added: 17.2.1

Links

Original Vendor Announcement

Relevant Products

Click on a version to see all relevant bugs

Affected versions:17.2.1

Fixed versions: 17.10.1, 17.10.1a, 17.10.1b, 17.3.1, 17.3.1a, 17.3.1w, 17.3.1x, 17.3.1z, 17.3.2, 17.3.2a, 17.3.3, 17.3.3a, 17.3.4, 17.3.4a, 17.3.4b, 17.3.4c, 17.3.5, 17.3.5a, 17.3.5b, 17.3.6, 17.4.1, 17.4.1a, 17.4.1b, 17.4.1c, 17.4.2, 17.4.2a, 17.5.1, 17.5.1a, 17.5.1b, 17.6.1, 17.6.1a, 17.6.1w, 17.6.1x, 17.6.1y, 17.6.1z, 17.6.1z1, 17.6.2, 17.6.3, 17.6.3a, 17.6.4, 17.6.5, 17.7.1, 17.7.1a, 17.7.1b, 17.7.2, 17.8.1, 17.8.1a, 17.9.1, 17.9.1a, 17.9.1w, 17.9.1x, 17.9.1x1, 17.9.2, 17.9.2a, 17.9.3, Amsterdam-17.3.1

Relevant Products

Click on a version to see all relevant bugs

Affected versions:17.2.1

Fixed versions: 17.10.1, 17.10.1a, 17.10.1b, 17.3.1, 17.3.1a, 17.3.1w, 17.3.1x, 17.3.1z, 17.3.2, 17.3.2a, 17.3.3, 17.3.3a, 17.3.4, 17.3.4a, 17.3.4b, 17.3.4c, 17.3.5, 17.3.5a, 17.3.5b, 17.3.6, 17.4.1, 17.4.1a, 17.4.1b, 17.4.1c, 17.4.2, 17.4.2a, 17.5.1, 17.5.1a, 17.5.1b, 17.6.1, 17.6.1a, 17.6.1w, 17.6.1x, 17.6.1y, 17.6.1z, 17.6.1z1, 17.6.2, 17.6.3, 17.6.3a, 17.6.4, 17.6.5, 17.7.1, 17.7.1a, 17.7.1b, 17.7.2, 17.8.1, 17.8.1a, 17.9.1, 17.9.1a, 17.9.1w, 17.9.1x, 17.9.1x1, 17.9.2, 17.9.2a, 17.9.3, Amsterdam-17.3.1

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